Thrust Augmentation for a Small Turbojet Engine.

Abstract

A Sophia J450 (nine pounds of thrust) gas turbine engine was used first to examine the thrust augmentation generated using an ejector shroud. Experimental results obtained with and without the ejector were compared with performance predicted using an engine code and a one-dimensional ejector analysis. The engine code was revised to incorporate a radial turbine and the correct compressor map. Thrust augmentation of 3-10% was measured and the trends were correctly predicted. Second, an engine shroud was designed and installed around the engine and flow measurements were conducted to determine the entrainment rate in the shroud. The engine shroud was the initial step toward designing a turboramjet.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1999
Accession Number
ADA362981

Entities

People

  • Gary L. Hackaday

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms
  • Human Systems
  • Materials and Manufacturing Processes
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Centrifugal Compressors
  • Compressors
  • Data Acquisition
  • Engines
  • Gages
  • Gas Turbines
  • Jet Aircraft
  • Jet Engines
  • Measurement
  • Pressure Measurement
  • Radial Turbines
  • Ramjet Engines
  • Thrust Augmentation
  • Turbine Components
  • Turbines
  • Turbojet Engines

Readers

  • Aerospace Engineering
  • Combustion and Flow Dynamics.